He feels an open summons and lets it grab him -
"I'll go find out. But I suspect the answer to the second question is 'tomorrow', and the answer to the first question can be dictated within reason."
"Back home - I cannot begin to speak to here - there is an afterlife. Most dead people wind up in Limbo, which is disappointing but not too awful. Dead summoners become daeva instead."
"...I see," says Miles. "I'm not immensely eager to test this, but I suppose it's good to know."
"It's a much better deal than being a Limboite, but I don't know what you were in for absent potential intervention from my afterlife system. If it weren't for daeva running around everywhere in my world I couldn't come up with a reason to expect an afterlife at all, and - there are not daeva running around everywhere here. Or, more tellingly, there are not people from Barrayar running around in Limbo."
"Right. And there's no one from Barrayar, or - Beta Colony, Illyrica, Tau Ceti, Marilac, Jackson's Whole, Cetaganda, et cetera - running around in Limbo. And I suppose it's reasonable to assume that if we all went there, you would've run into a few by now. So. My universe is just as much of a theological question mark as it was this morning."
"Quite, except now there's a possibility you'll be hijacked by what is at least a known quantity."
"Right, which is either reassuring or the opposite, depending on the outcome of that question mark."
"Well, I can't claim to be particularly accurate, lacking many opportunities to check my guesses, but my guesses are based on personality-related sympathy to the magic type, and from you I'm getting a 'change the thing that is there' rather than a 'move it around' or a 'start with an entirely new thing' attitudinal vibe."
"No way to check that doesn't have its drawbacks, of course. And I could be wrong about how the assignment works."
"Oh, I'm a dead summoner myself. Bullet to the head, I was twenty-two, not fun - being a demon's great and all but I didn't manage to get in touch with my parents again before they died too, and it's hell on career aspirations, wouldn't you know it. So to speak."